PARTICULATE MODEL OF MATTER

Particulate Model of Solids

The particles are packed closely together. The forces in between are strong enough,

thus the particles cannot move freely but can vibrate in their position.

Therefore, solid has got definite shape and volume.

We can change the shape of a solid by using force or when it is broken or cut.

Particulate Model of Solids

They are strongly attracted to one another.

The particles are arranged in a fixed, regular pattern.

The particles are so close, hence solid cannot be compressed.

Particulate Model of Liquids

The particles are closely packed together. The molecules have enough energy to

move over short distances freely. Therefore, liquids does not have definite

shape but have definite volume. Hence, liquids takes up the shape of a

container.

Particulate Model of Liquids

The particles are attracted to one another.

The particles are not arranged in a fixed or regular pattern.

The particles are attracted to one another, hence liquids cannot be compressed.

Particulate Model of Gases

The particles are far apart from one another.

Since the particles are far apart, gases will be able to move around freely in any directions.

Gases are able to move freely to occupy any spaces that is available. Thus gases does not have definite shape or volume.

Particulate Model of Gases

The particles are weakly attracted to one another.

The particles in gases are spaced far apart from one another, therefore gases can be compressed easily.

Solids to Liquids

When a solid is being heated by a strong heat, the particles will gain more energy and vibrates more vigorously.

Once reaching the melting point, the particles would break free from one another and would move about randomly.

The particles are no longer in a definite shape.

The process is called Melting.

Liquids to Solids

When the liquid particles is cooled, the particles would loss energy and began to move more slower.

As the temperature continues to fall, the particles would loss even more energy until they are very close together, to attract them to a fixed position.

The substance had changed from liquid to solid.

The process is called Freezing.

Liquids to Gases

When the particles in liquid is heated, they would gain energy and vibrates vigorously.

When the particles reaches the boiling point, they break free from one another and the particles would be arranged very far apart, moving at a great speed.

This process is called Boiling.

Gases to Liquids

When the particles in gas are cooled, they would loss energy and starts to move slower.

If the temperature continues to fall, the particles would loss more energy, until they are close enough to be attracted to one another.

This process is called Condensation.

- The End -

Done by : ( Leader ) See Chin Yong ( A. Leader ) Gabryl Russel ( Member ) Titally Tan ( Member ) Wong Chong En ( Member ) Tan Guan Rong